2405687866042 has 4 divisors (see below), whose sum is σ = 3608531799066. Its totient is φ = 1202843933020.

The previous prime is 2405687866039. The next prime is 2405687866081. The reversal of 2405687866042 is 2406687865042.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2344417260201 + 61270605841 = 1531149^2 + 247529^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601421966509 + ... + 601421966512.

Almost surely, 2^{2405687866042} is an apocalyptic number.

2405687866042 is a deficient number, since it is larger than the sum of its proper divisors (1202843933024).

2405687866042 is a wasteful number, since it uses less digits than its factorization.

2405687866042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1202843933023.

The product of its (nonzero) digits is 30965760, while the sum is 58.

The spelling of 2405687866042 in words is "two trillion, four hundred five billion, six hundred eighty-seven million, eight hundred sixty-six thousand, forty-two".